摘要
为提高磁通反向式永磁电机的转矩密度,提出了两种分布式绕组拓扑结构。基于子域法建立的解析模型,计算对比了采用不同绕组拓扑结构时电机的磁场和电磁性能,结果表明两种分布式绕组结构均可大幅提高电机的能量密度。分析了永磁体宽度、同一齿上永磁体间夹角和转子槽宽等电机结构参数对转矩脉动的影响,通过合理的选择结构参数,可在保持平均转矩不变的情况下,显著减小电机转矩脉动。设计制造了一台6/8极结构样机,通过有限元法和实验对解析模型进行了验证。结果表明,所提方法能够体现结构参数和电机性能之间的关系,计算速度快,特别适用于电机的初始设计和优化计算。
In order to improve the power density of flux reversal machine （FRM）, two kinds of distributed winding topologies were proposed in this paper. The magnetic field and electromagnetic performance was calculated and compared with the analytical models by the subdomain method. The results show that the power density can be greatly improved with the distributed windings than that with concentrated windings. The effect of geometrical parameters including the permanent magnet （PM） width, the included angle between the PMs and the rotor slot width angle on the torque ripple was also studied, and the torque ripple reduction method was advised. At last, the analytical model was verified with finite element method （FEM） and prototype motor experiment. The analytical model can provide closed-form solutions and be easily used to compare different machine topologies and dimensions, so it is an useful tool in the initial design and optimal design of FRM.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第11期2838-2846,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(51107075)~~
关键词
磁通反向式永磁电机
子域法
解析法
有限元法
齿槽转矩
分布式绕组
flux reversal machine （FRM）
the subdomainmethod
analytical method
finite element method （FEM）
cogging torque
the distributed winding
